A researcher believes that the percentage of people who, Ask an Expert

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A researcher believes that the percentage of people who exercise in California is greater than the national exercise rate. The national rate is 20%. The researcher gathers a random sample of 120 individuals who lives in CA and finds that the number who exercises regularly is 31 out of 120.

a. What is X2 obt?

b. What is the df for this test?

c. What is X2 cv?

d. What conclusion should be drawn from these results?

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